Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 99)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 92
The Stage timer starts once the following criteria are satisfied:
Minimum RPM – This input establishes the minimum RPM the engine must reach to initiate the boost
timing sequence.
Minimum Throttle Position Sensor (TPS) – This input establishes the minimum throttle position the
TPS sensor must reach to initiate the boost timing sequence.
Both the Minimum RPM and Minimum Throttle Position inputs must be satisfied before the boost
timing is initiated.
62. Boost PWM
Before this table becomes active, PWM needs to be selected in the Boost mode window of the boost
configuration table. The values inputted into the PWM window below represent the percent (%) duty
cycle of the boost valve. The PWM boost function will run continuously when this mode is enabled.
The solenoid valve used must be a Normally Closed (NC) valve. The valve is T’d into the line from
the turbo compressor to the bottom of the waste gate diaphragm. The solenoid valve resistance must
not be lower than 14 ohms w /14 volt supply (1 A). One end of the solenoid valve is connected to
Switched Ignition and the other to the Boost Connector, Pin B. See
Boost_Connector_Pin_Out .
Same as screen above with window maximized.
To change a value in the Boost PWM table, move the cursor using the PC’s mouse or arrow keys to
the cell to be changed. Input the desired value and hit
“Enter”
to save the change.